package com.gtx.common.config.security;

import com.gtx.common.pojo.Admin;
import com.gtx.common.service.IAdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import javax.annotation.Resource;

/**
 * Security配置类
 *
 * @author songyurui
 */
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private IAdminService adminService;
    @Autowired
    private RestAuthorizationEntryPoint restAuthorizationEntryPoint;
    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(passwordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // 使用JWT，不需要csrf
        http.csrf()
                .disable()
                // 基于token，不需要session
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 允许登录访问
                .antMatchers("/login","/logout").anonymous()
                .antMatchers(HttpMethod.GET,
                        "/*.html",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js").anonymous()
                .antMatchers("/test")
                .permitAll()
                // 除了上面的，所有请求都要认证
                .anyRequest()
                .authenticated()
                .and()
                // 禁用缓存
                .headers()
                .cacheControl();
        // 添加jwt 登录授权过滤器
        http.addFilterBefore(jwtAuthencationTokenFilter(), UsernamePasswordAuthenticationFilter.class);
        // 添加自定义未授权和未登录结果返回
        http.exceptionHandling()
                .accessDeniedHandler(restfulAccessDeniedHandler)
                .authenticationEntryPoint(restAuthorizationEntryPoint);
    }

    @Override
    @Bean
    public UserDetailsService userDetailsService() {
        return username -> {
            Admin admin = adminService.getAdminByUserName(username);
            if(null != admin) {
                return admin;
            }
            return null;
        };
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthencationTokenFilter jwtAuthencationTokenFilter() {
        return  new JwtAuthencationTokenFilter();
    }
}
